It does seem like they’ve wasted a lot of time designing a lot of obsolete features. It’s probably been all of these systems, along with the upkeep of (trying to) balance them, that have interefered with the development of other parts of the game… and why it’s so difficult trying to petition for player housing, along with even simpler updates.
For example, players have been posting for over two years to get the other Kul Tiran flight form variants (black, green, yellow) put back in the game. Not one blue response; no explanation as to why they were just removed from BfA PTR, and obviously no fix/reinsertion. It’s why I’m not pre-ordering DF.
If they still can’t get the small stuff right, then why should I trust their QA and attention to detail on an entire xpac 
Just to re-iterate, here’s an old bug report from BfA: Kul Tiran Flight Form - Support / Bug Report - World of Warcraft Forums (blizzard.com)
Players still reporting the same problem Apr '19, May '19, Jun '19, Oct '19, Jan '20, Apr '20, May '20, Jun '20, Jan '21, May '21, Dec '21, Jun '22.
Notice how many of them are still listed as 120. I wonder at what point they just gave up and/or unsubbed. But hey, at least we got had azerite, corruptions, and covenants instead of more customization options and player housing.